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True BloodSuckers - Leeches

http://www.sciencefriday.com
For many of us, there are few creatures more nefarious and loathsome as leeches. But do these parasites deserve their bad reputation as mindless bloodsuckers? Dr. Mark Siddall a.k.a. "The Leech Guy," exposes our many misconceptions of these carnivorous worms and details his on-going research at the American Museum of Natural History into each species' unique cocktail of anti-clotting blood poisons.
Produced by Luke Groskin
Music by Audio Network
Additional Footage and Stills by Dr. Mark Siddall Shutterstock, Derek Morisson (C.C. 3.0), Alan Kuehner (C.C. 3.0), Rebecca VO (C.C. 3.0) Leo Kenney / Vernal Pool Association Steven Johnson, William Moser, Landcare Research – Manaaki Whenua
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